I came across several really nice army jokes. Here is one of them for you. Have fun!

The Officer of the Day discovered a sentry engrossed in a book. "Don’t you know it's offence to read on guard duty?" he roared."Oh! I'm not reading, sir, this is a dictionary.""A dictionary?""Yes, sir. You know how it gets kinda lonely here on post and you start to talk to yourself. Well, sometimes I come out with a word I don't understand and I like to look it up."